比如蓝牙要FCC，儿童用品要CPC

1. Standalone silicone teether mitts or textured teething tubes/sticks that give similar gum relief at a lower price and with simpler use than a stacking set
2. Classic plastic stacking cups, which cover the developmental stacking/play need more cheaply and are widely available, while parents can use a separate basic teether they may already own
3. Household-safe sensory substitutes for supervised play, such as measuring cups, large silicone kitchen rings, or BPA-free nesting containers, which can mimic stacking/exploration without buying a dedicated baby stacking-ring product
4. Baby board books or crinkle cloth books with chew-safe corners/tabs, offering distraction plus sensory engagement for babies whose parents prioritize calming/occupying over a dedicated teething-stacker combo
5. Pacifier-style refrigerated teethers or water-filled cooling teethers, which may be preferred by parents specifically seeking stronger cooling relief rather than a multifunction stacking toy
6. Activity gym or stroller toy attachments with chewable elements, which can replace the need for a separate teether-stacker by combining entertainment and mouthing access in gear parents may already own
7. Open-ended Montessori loose-parts play using existing large soft blocks or nesting toys already in the home, reducing the need to purchase a dedicated silicone ring stacker just for early motor-skill practice

有替代品会影响你的风险